In the rear, the bolts go through the plastic deck and into the holes in the frame itself– very secure. In the front, the Yepp Maxi adapter is bolted to the plastic deck, which is why it is necessary. The plastic deck has some flex it, so I’ve further used a couple zip-ties on each side to further secure the Yepp Maxi adapter to the frame.

I absolutely wouldn’t depend on zip-ties for a primary connection. I think they could easily twist and break. My primary connection is to the frame itself.

You might be able to use something else that is very stiff in place of the plastic deck product.